package com.txsj.scan.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 * Created by 徐嘉健 on 2018/10/16.
 */

public class DateYearUtils {
    /**
     * 计算相差多少年
     *
     * @return
     */
    public static Long dataYear(long currentYear, long bath) {
        long strTime = 0;
        strTime = currentYear + bath;
        return strTime;
    }


    /**
     * 计算相差多少月
     *
     * @return
     */

    public static String dearMonth(long currentYear, long currentMonth, long bath) {
        long strmonth = 0;
        //月
        if ((currentMonth + bath) > 12) {
            strmonth = ((currentMonth + bath) % 12);
        } else {
            strmonth = currentMonth + bath;
        }
        //年
        currentYear = (currentMonth + bath) / 12 + currentYear;
        return currentYear + "-" + strmonth;
    }


    /**
     * 计算相差多少天
     *
     * @param day
     * @param dayAddNum
     * @return
     */
    public static String getDateStr(String day, long dayAddNum) {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
        Date nowDate = null;
        try {
            nowDate = df.parse(day);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        Date newDate2 = new Date(nowDate.getTime() + dayAddNum * 24 * 60 * 60 * 1000);
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        String dateOk = simpleDateFormat.format(newDate2);
        return dateOk;
    }

    /**
     * 计算年的差
     *
     * @param currentYear
     * @param bath
     * @return
     */
    public static Long LastYear(long currentYear, long bath) {
        long strTime = 0;
        strTime = currentYear - bath;
        return strTime;
    }

    /***
     * 计算月与过期时间的差
     * @param datetime
     * @param bath
     * @return
     */

    public static String dateFormat(String datetime, long bath) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
        Date date = null;
        try {
            date = sdf.parse(datetime);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        Calendar cl = Calendar.getInstance();
        cl.setTime(date);
        cl.add(Calendar.MONTH, (int) -bath);
        date = cl.getTime();
        return sdf.format(date);
    }

    /**
     * 日期 天数的 差
     *
     * @param day
     * @param Num
     * @return
     */
    public static String getLastDateStr(String day, int Num) {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
        Date nowDate = null;
        try {
            nowDate = df.parse(day);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        //如果需要向后计算日期 -改为+
        Date newDate2 = new Date(nowDate.getTime() - (long) Num * 24 * 60 * 60 * 1000);

        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");

        String dateOk = simpleDateFormat.format(newDate2);
        return dateOk;
    }

}
